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Posted to common-issues@hadoop.apache.org by "Vinay (JIRA)" <ji...@apache.org> on 2012/06/01 14:14:23 UTC
[jira] [Updated] (HADOOP-8397) NPE thrown when IPC layer gets an
EOF reading a response
[ https://issues.apache.org/jira/browse/HADOOP-8397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vinay updated HADOOP-8397:
--------------------------
Attachment: HADOOP-8397.patch
> NPE thrown when IPC layer gets an EOF reading a response
> --------------------------------------------------------
>
> Key: HADOOP-8397
> URL: https://issues.apache.org/jira/browse/HADOOP-8397
> Project: Hadoop Common
> Issue Type: Bug
> Components: ipc
> Affects Versions: 2.0.0-alpha
> Reporter: Todd Lipcon
> Assignee: Vinay
> Priority: Critical
> Attachments: HADOOP-8397.patch
>
>
> When making a call on an IPC connection where the other end has shut down, I see the following exception:
> Caused by: java.lang.NullPointerException
> at org.apache.hadoop.ipc.Client$Connection.receiveResponse(Client.java:852)
> at org.apache.hadoop.ipc.Client$Connection.run(Client.java:781)
> from the lines:
> {code}
> RpcResponseHeaderProto response =
> RpcResponseHeaderProto.parseDelimitedFrom(in);
> int callId = response.getCallId();
> {code}
> This is because parseDelimitedFrom() returns null in the case that the next thing to be read on the stream is an EOF.
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